Ryusei

Ryusei is one of Mahiru's childhood friends and classmate. He is often seen with Koyuki.

Story
Ryusei is first seen with Mahiru in class preparing for the cultural festival with Koyuki and Sakuya.

When the four of them are stopped on the street by Belukia, who is posing as a magician, Ryusei remarks that magic is lame and tries to leave. Belukia stops him from going and asks the others a question. He asks them why he stopped Ryusei, then gives them four multiple choice answers for them to choose from- all of which are correct. The choices were: After announcing that all answers are true, Belukia bites into Ryusei's left shoulder/neck and lets him fall to the ground. Koyuki then takes Ryusei into his arms and shouts for help.
 * 1) He ignored me.
 * 2) Walked past me.
 * 3) I'm hungry!
 * 4) He ignored me. Again.

The next day at school, Mahiru rushes in, concerned for Ryusei. He finds Ryusei with a bandage around his neck and Koyuki tells him that Ryusei was in a car accident. Confused, Mahiru reminds them of what happened the day before. The two don't believe him and say that he is telling one of Sakuya's fairytales. Ryusei tells Mahiru that he wasn't there when he was injured.